CN108867382A - Anchor system and construction method after prestressing force type - Google Patents
Anchor system and construction method after prestressing force type Download PDFInfo
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- CN108867382A CN108867382A CN201810615841.1A CN201810615841A CN108867382A CN 108867382 A CN108867382 A CN 108867382A CN 201810615841 A CN201810615841 A CN 201810615841A CN 108867382 A CN108867382 A CN 108867382A
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- cable
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- steel
- prestressing force
- force type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The present invention provides anchor systems after a kind of prestressing force type comprising concrete pedestal, one lateral plates are fitted closely with bedrock surface, and the opposite other side is fixedly connected with several goosenecks and steel stringer；Prestress anchorage cable, one end are extended linearly across concrete pedestal and the anchor connection of steel stringer, and the other end is extended linearly into rock；Inclined cable-stayed or cable ring rope, one end, which is extended linearly, to be fixedly connected with gooseneck anchor connection, the other end with erection or cable crane system.The present invention also provides provide anchor construction method after a kind of a kind of prestressing force type based on anchor system after the prestressing force type.The technical solution structure stress is clear, easy for construction.
Description
Technical field
The present invention relates to anchor system after a kind of and construction method, anchor system and construction party after especially a kind of prestressing force type
Method.
Background technique
With the fast development of highway in China building cause, the bridge construction as highway construction important component is obtained
It flourishes.Especially development of the West Regions construction is thriving, and road need to cross over intermountain valley, river, river, is typically chosen at this time
It is crossed over using type of bridge, and the structure type of bridge is often suspension bridge, cable-stayed bridge, it is especially many with arch bridge.
The emphasis and difficult point of Arch Bridge Construction are that main arch ring is constructed.Most popular method in mountain area arch bridge main arch ring construction at present
Mainly have：Stiff skeleton method, erection with cableway, construction by swing, erection by protrusion, cast-in-place cantilever method etc., and many constructions
Method be unable to do without CABLEWAY ERECTION SYSTEM or erection, and core is rear anchor section in this two big system.
Currently, mainly having gravity anchor, tunnel-type anchorage and combined type anchor as permanent structure (such as suspension bridge) anchorage
Heavy stone used as an anchor.Either as the CABLEWAY ERECTION SYSTEM of temporary structure or the rear anchor of erection, the main function of anchorage is all to use
To carry and balance the huge pulling capacity of cable, it is ensured that the safety and stability of whole system.
Gravity anchor is at present using one of most common anchorage form.Since gravity anchor is bulky, and hold
By huge horizontal loading, therefore it is required that ground vertical bearing capacity with higher and biggish horizontal coefficient of friction below.
For karst area, though the high distribution solution cavity of rock strength, and solution cavity is mostly cavity or filling clay, is not able to satisfy anchorage
Requirement for bearing capacity.On the other hand, due to the presence of solution cavity, underground water is often very abundant, brings to anchorage construction and durability
Large effect.
Compared with gravity anchor, bridge anchorage is cheap, for example permanent structure Analysis of Suspension Bridges ' Anchorage, is built in 2000 years
The Chongqing E Gongyan Yangtze Bridge, tunnel-type anchorage force of gravity formula anchorage save 15,000,000 yuan or so.Due to tunnel anchorage can with enclose
Rock one works carries the huge pulling force of main push-towing rope jointly, the extensive excavation to original place table is avoided, in terms of protecting environment
Advantage is that gravity anchor is irreplaceable.Although tunnel-type anchorage heavy force formula anchorage in terms of saving construction cost, environmental protection has
Clear advantage, but the practical engineering application of tunnel-type anchorage is seldom, tracing it to its cause is cable due to large-span suspension bridge
Power is larger (single cable reaches tens of thousands of tons), higher for the rock quality at bridge location anchorage, and since male cone body size is larger, opens
The difficulty for digging supporting is larger.But for the rear anchor system of temporary institution, after the Suo Li for needing to balance is with respect to permanent structure bridge
Much smaller for anchor, the project amount and supporting difficulty excavated certainly are much smaller, therefore according to live actual landform, sufficiently send out
The advantage of tunnel anchorage is waved, the design interim anchorage of tunnel type is entirely possible.
Construction prestressed cable technology has been widely used in science of bridge building, wherein using prestressed anchor Cable Structure as cable
The successful engineering experience of the anchorage of rope Lift-on/Lift-off System or erection proves that prestress anchorage cable Technology application is in large-scale lifting
The anchorage structures of facility are safe and reliable.However the technology is limited in practical application by topographic and geologic condition, anchorage position
Buried depth of bedrock should not use when deeper.Different base rock conditions, need scene anchor force experimental data, need special equipment into
The series of factors requirement such as row construction selects anchor chain-formed anchor to need specific research as the case may be.
Western mountainous areas complicated geology, common soft rock foundation, intensity is low, Lack of support, and in stress long term
Under, it is easy to happen creep, while soft rock foundation is low with the coefficient of friction of concrete cement plane, especially chance water will occur
Ruckbildung, so that cement plane micro-structural system becomes loosely, to reduce the cohesive force and internal friction angle of cement plane, in turn
Lead to the strength reduction of cement plane.In order to improve the stability against sliding of anchorage, certainly will need to increase anchorage scale, it is ensured that anchorage base
Plinth has enough skid resistances, but also increases project cost simultaneously.As the rear anchor system of temporary structure, if due to soft rock foundation
Many unfavorable geological conditions often take increasing buried depth, and the lower rock stratum of selective weathering degree is as supporting course, or is aided with
The measures such as stake, open caisson, ground continuous wall base have so inevitably enlarged project amount and material consumption, make cost substantially on
It rises.Therefore, traditional anchorage structures design can not meet reasonable, economic, safe temporary structure anchorage design theory.
So, it is possible to find gravity anchor generallys use the anchor body that concreting forms large volume, by self weight and ground
Frictional force between base is come the pulling capacity for the system of resisting, and earthwork evacuation amount is big, concrete construction amount is more, to ecological environment shadow
It rings greatly, and usually will appear unstable slopes or different earth formations in the construction process, so as to cause entire anchorage
There is probabilistic deformation, causes the phenomenon that anchorage is unstable, using often resulting in constructional difficulties in Bridges in Mountainous Areas construction,
And it is unfavorable for reducing project cost.
The stress of tunnel-type anchorage is similar to conventional support anchor rod, but its actual size and actual loading big will obtain
More, the factor for influencing its stability is also more more complicated, and the requirement to country rock is also higher.Possible destruction after tunnel anchorage stress
Mode mainly has：Massif overall deformation unstable failure, country rock failure by shear, country rock and anchorage concrete cement plane failure by shear and
Anchor rope breakage skids off.Because technical problem involved in tunnel-type anchorage is more, difficulty of construction is big, therefore hinders its extensive hair
Exhibition.
Gravity anchor (tunnel anchorage)+anchor cable combined type anchorage, the durability of anchor cable are difficult to ensure.Rock mass and armored concrete
The drilling of plate combined type anchorage is more, and working procedure is complicated.
In conclusion the rear anchor system as current temporary structure, not only wastes a large amount of human and material resources and financial resources, more
Important is the constructions of above-mentioned form anchorage can bring disturbance to precipitous side slope, and faces tail rope angle simultaneously and should not adjust
It is whole so that tail rope be easy bending, Engineering Quality Control difficulty is big, the construction period is long, security risk is big, stress is indefinite and compared with
Complicated, some column problems of high cost.
Summary of the invention
Anchor system after clear, a kind of prestressing force type easy for construction that it is an object of the present invention to provide a kind of structure stresses
System.
The second purpose of the present invention is to provide anchors after a kind of a kind of prestressing force type based on anchor system after the prestressing force type to apply
Work method.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is as follows：
Anchor system after a kind of prestressing force type comprising：
Concrete pedestal, one lateral plates are fitted closely with bedrock surface, and it is horizontal that the opposite other side is fixedly connected with several steel
Beam and steel stringer；
Prestress anchorage cable, one end is extended linearly across the concrete pedestal and the steel stringer anchor connection, another
It is linear to extend in rock；
Inclined cable-stayed or cable ring rope, one end extend linearly and the gooseneck anchor connection, the other end and oblique pull button
Extension system or cable crane system are fixedly connected.
Preferably, anchor system after above-mentioned prestressing force type, wherein the concrete pedestal is serrated, including the plate
Face, and protrude from the vertical concrete rib at several intervals that are parallel to each other of the plate face.
Preferably, anchor system after above-mentioned prestressing force type, the interval setting wherein several goosenecks are parallel to each other, point
It is not fixedly connected with the outermost vertical concrete rib, and through between the outermost vertical concrete rib
Other described vertical concrete ribs.
Preferably, anchor system after above-mentioned prestressing force type, wherein several steel stringers are located on the gooseneck
Side corresponds the top surface for being fixedly connected on the vertical concrete rib respectively.
Preferably, anchor system after above-mentioned prestressing force type, wherein the gooseneck is parallel to each other, interval setting, is wrapped respectively
It includes left and right two panels I-steel, by upper and lower steel plate solder design between the I-steel, is equipped among the upper and lower steel plate suitable
In the first circular hole corresponding with the Inclined cable-stayed or cable ring rope.
Preferably, anchor system after above-mentioned prestressing force type, wherein the web two sides of the I-steel are round close to described first
Hole location is provided with stiffener.
Preferably, anchor system after above-mentioned prestressing force type, the interval setting wherein the steel stringer is parallel to each other, including it is mutual
And the two panels I-steel of connection is welded, top and bottom are welded and connected with upper and lower steel plate, are equipped among the upper and lower steel plate
Suitable for the second circular hole corresponding with the prestress anchorage cable.
Preferably, anchor system after above-mentioned prestressing force type, wherein the web two sides of the I-steel are round close to described second
Hole location is provided with stiffener.
A kind of anchor construction method after prestressing force type comprising following steps：
S1：Construction prestress anchorage cable, in the deep of rock, arrangement beats anchor cable hole, and it is fixedly mounted in anchor cable steel strand wires
In；
S2：Concrete pedestal of constructing corrects original ground concordantly simultaneously before the plate face and basement rock face contact of the pedestal
It is excavated to bedrock surface, it is ensured that concrete pedestal plate face is fitted closely with bedrock surface；Either after being excavated to bedrock surface, mould is shut
Plate, use are cast-in-place；
S3：Gooseneck is installed, gooseneck is installed and connected in concrete pedestal；
S4：Steel stringer is installed, steel stringer is installed and connected in concrete pedestal；
S5：The free end of stretch-draw prestressing force anchor cable in step S1 is corresponded to and is connected and fixed with steel stringer；
S6：Inclined cable-stayed or cable ring rope, by itself and the gooseneck anchor connection in step S3, the other end and oblique pull are installed
Buckling and hanging system or cable crane system are fixedly connected.
Preferably, anchor construction method after above-mentioned prestressing force type, wherein Inclined cable-stayed or cable ring rope and step in step S6
Gooseneck in rapid S3 is fixed using P anchoring.
Compared with prior art, the technology of the present invention advantage is：The technical solution using prestress anchorage cable make after anchor mainly by
Power structure, the anchor cable that erection or cable crane system are resisted by the frictional force between prestress anchorage cable and rock are drawn
Power, it is simple in sturcture, ingenious in design, it is rationally distributed, and also structure stress is clear, easy for construction.Meanwhile the technical solution utilizes
The design structure that concrete pedestal is combined with basement rock, one side make full use of existing structure, reduce project cost, another
Aspect greatly reduces construction volume, has saved construction period.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is structural schematic diagram of the embodiment of the present invention；
Fig. 2 is concrete pedestal structural schematic diagram in the embodiment of the present invention；
Fig. 3 is gooseneck structural schematic diagram in the embodiment of the present invention；
Fig. 4 is steel longitudinal beam structure schematic diagram in the embodiment of the present invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The present invention is described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.
As shown in Figure 1 to 4, anchor system after a kind of prestressing force type, including concrete pedestal 1, prestress anchorage cable 4, oblique pull
Button is hung or cable ring rope 5；Plate face 10 and the bedrock surface of concrete pedestal 1 fit closely, if the opposite other side is fixedly connected with
Dry gooseneck 2 and steel stringer 3；One end of prestress anchorage cable 4 is extended linearly across concrete pedestal 1 and 3 anchor connection of steel stringer,
The other end is extended linearly into rock；One end of Inclined cable-stayed or cable ring rope 5 extend linearly with 2 anchor connection of gooseneck, separately
One end is fixedly connected with erection or cable crane system.
The main force structure of anchor after the technical solution is made using prestress anchorage cable, by between prestress anchorage cable and rock
Frictional force resists the anchor cable pulling force of erection or cable crane system, simple in sturcture, ingenious in design, rationally distributed, and
And structure stress is clear, easy for construction.Meanwhile the design structure that the technical solution is combined using concrete pedestal with basement rock,
Its one side makes full use of existing structure, reduces project cost, on the other hand greatly reduces construction volume, has saved construction week
Phase.
Specifically, as shown in Fig. 2, concrete pedestal 1 is serrated, including plate face 10, and if protruding from plate face 10
The vertical concrete rib 11 at the dry interval that is parallel to each other.
Several goosenecks 2, which are parallel to each other, is spaced setting, is fixedly connected respectively with outermost vertical concrete rib 11, and
Through other vertical concrete ribs 11 between the outermost vertical concrete rib 11；Several steel stringers 3 are located at
2 top of gooseneck, corresponds the top surface for being fixedly connected on vertical concrete rib 11 respectively.
Gooseneck 2 be parallel to each other interval setting, specifically, as shown in figure 3, its respectively include left and right two panels I-steel (20,
21), between I-steel (20,21) by upper steel plate 22, lower steel plate solder design, upper steel plate 22 is equipped among lower steel plate and is suitable for
First circular hole 23 corresponding with Inclined cable-stayed or cable ring rope 5, the web two sides of I-steel (20,21) are close to the first circular hole 23
Stiffener 24 is provided at position.
Steel stringer 3, which is parallel to each other, is spaced setting, specifically, as shown in Figure 4 comprising two panels I-shaped that is mutual and welding connection
Steel (30,31), top and bottom are welded and connected with upper and lower steel plate (32,33), are equipped among upper and lower steel plate (32,33) suitable
In second circular hole 34 corresponding with prestress anchorage cable 4, the web two sides of I-steel (30,31) are close to second circular hole 34
The place of setting is provided with stiffener 35.
A kind of anchor construction method after prestressing force type comprising following steps：
S1：Construction prestress anchorage cable, in the deep of rock, arrangement beats anchor cable hole, and it is fixedly mounted in anchor cable steel strand wires
In, specifically, drilling machine is arranged in rock surface, is gradually drilled by export-oriented rock depths, then steel strand, is finally filled
Slurry；
S2：Concrete pedestal of constructing corrects original ground concordantly simultaneously before the plate face and basement rock face contact of the pedestal
It is excavated to bedrock surface, it is ensured that concrete pedestal plate face is fitted closely with bedrock surface；Either after being excavated to bedrock surface, mould is shut
Plate, use are cast-in-place；
S3：Gooseneck is installed, gooseneck is installed and connected in concrete pedestal；
S4：Steel stringer is installed, steel stringer is installed and connected in concrete pedestal；
S5：The free end of stretch-draw prestressing force anchor cable in step S1 is corresponded to and is connected and fixed with steel stringer；
S6：Inclined cable-stayed or cable ring rope, by itself and the gooseneck anchor connection in step S3, the other end and oblique pull are installed
Buckling and hanging system or cable crane system are fixedly connected.
Wherein Inclined cable-stayed or cable ring rope and the gooseneck in step S3 are fixed using P anchoring in step S6.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that：Its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. anchor system after a kind of prestressing force type, which is characterized in that including：
Concrete pedestal, one lateral plates are fitted closely with bedrock surface, the opposite other side be fixedly connected with several goosenecks and
Steel stringer；
Prestress anchorage cable, one end are extended linearly across the concrete pedestal and the steel stringer anchor connection, another end line
Property extends in rock；
Inclined cable-stayed or cable ring rope, one end extend linearly and the gooseneck anchor connection, the other end and Inclined cable-stayed system
System or cable crane system are fixedly connected.
2. anchor system after prestressing force type according to claim 1, which is characterized in that the concrete pedestal is serrated,
Including the plate face, and protrude from the vertical concrete rib at several intervals that are parallel to each other of the plate face.
3. anchor system after prestressing force type according to claim 2, which is characterized in that between several goosenecks are parallel to each other
It every setting, is fixedly connected respectively with the outermost vertical concrete rib, and through positioned at the outermost longitudinal direction
Other described vertical concrete ribs between concrete rib.
4. anchor system after prestressing force type according to claim 3, which is characterized in that several steel stringers are located at institute
It states above gooseneck, corresponds the top surface for being fixedly connected on the vertical concrete rib respectively.
5. anchor system after prestressing force type according to claim 1, which is characterized in that the gooseneck interval that is parallel to each other is set
It sets, respectively includes left and right two panels I-steel, by upper and lower steel plate solder design between the I-steel, in the upper and lower steel plate
Between be equipped be suitable for the first circular hole corresponding with the Inclined cable-stayed or cable ring rope.
6. anchor system after prestressing force type according to claim 5, which is characterized in that the web two sides of the I-steel close to
The first circle hole location is provided with stiffener.
7. anchor system after prestressing force type according to claim 1, which is characterized in that the steel stringer interval that is parallel to each other is set
It sets, including mutually and welding the two panels I-steel of connection, top and bottom are welded and connected with upper and lower steel plate, the upper and lower steel plate
Centre, which is equipped with, is suitable for the second circular hole corresponding with the prestress anchorage cable.
8. anchor system after prestressing force type according to claim 7, which is characterized in that the web two sides of the I-steel close to
The second circle hole location is provided with stiffener.
9. anchor construction method after a kind of prestressing force type, which is characterized in that include the following steps：
S1：Construction prestress anchorage cable, in the deep of rock, arrangement beats anchor cable hole, and anchor cable steel strand wires are fixedly mounted wherein；
S2：Original ground is corrected concordant and excavated by concrete pedestal of constructing before the plate face and basement rock face contact of the pedestal
To bedrock surface, it is ensured that concrete pedestal plate face is fitted closely with bedrock surface；Either after being excavated to bedrock surface, template is shut,
Using cast-in-place；
S3：Gooseneck is installed, gooseneck is installed and connected in concrete pedestal；
S4：Steel stringer is installed, steel stringer is installed and connected in concrete pedestal；
S5：The free end of stretch-draw prestressing force anchor cable in step S1 is corresponded to and is connected and fixed with steel stringer；
S6：Inclined cable-stayed or cable ring rope, by itself and the gooseneck anchor connection in step S3, the other end and Inclined cable-stayed are installed
System or cable crane system are fixedly connected.
10. anchor construction method after prestressing force type according to claim 9, which is characterized in that in step S6 Inclined cable-stayed or
Gooseneck in cable ring rope and step S3 is fixed using P anchoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615841.1A CN108867382A (en) | 2018-06-14 | 2018-06-14 | Anchor system and construction method after prestressing force type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615841.1A CN108867382A (en) | 2018-06-14 | 2018-06-14 | Anchor system and construction method after prestressing force type |
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| Publication Number | Publication Date |
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| CN108867382A true CN108867382A (en) | 2018-11-23 |
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ID=64339158
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| CN201810615841.1A Pending CN108867382A (en) | 2018-06-14 | 2018-06-14 | Anchor system and construction method after prestressing force type |
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| CN105862571A (en) * | 2016-05-27 | 2016-08-17 | 长安大学 | Bridge anti-seismic and anti-overturning construction and bridge anti-seismic and anti-overturning method |
| CN106968139A (en) * | 2017-03-09 | 2017-07-21 | 中铁十九局集团有限公司 | The construction method of railway bed supporting in undercrossing tunnel jacking framed bridge jack-in process |
| US9822498B2 (en) * | 2015-06-26 | 2017-11-21 | Structure Sight LLC | Precast concrete bridge unit and headwall assembly and method of production |
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2018
- 2018-06-14 CN CN201810615841.1A patent/CN108867382A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397597A (en) * | 2013-08-14 | 2013-11-20 | 中铁大桥局股份有限公司 | Large-tonnage combination anchoring system and method for rocky slope |
| CN103572701A (en) * | 2013-10-08 | 2014-02-12 | 中铁十八局集团有限公司 | Buckling anchor system combined rock anchor |
| CN203846399U (en) * | 2013-10-08 | 2014-09-24 | 中铁十八局集团有限公司 | Combined type rock anchor with buckling anchor system |
| CN204112222U (en) * | 2014-04-10 | 2015-01-21 | 中交一公局第一工程有限公司 | The bracing or strutting arrangement of main rope of suspension bridge anchoring prestress pipeline |
| US9822498B2 (en) * | 2015-06-26 | 2017-11-21 | Structure Sight LLC | Precast concrete bridge unit and headwall assembly and method of production |
| CN105862571A (en) * | 2016-05-27 | 2016-08-17 | 长安大学 | Bridge anti-seismic and anti-overturning construction and bridge anti-seismic and anti-overturning method |
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